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Effect of Transmembrane Electric Field on GM1 Containing DMPC–Cholesterol Monolayer: A Computational Study

  • Zarrin Shahzadi
  • Chaitali MukhopadhyayEmail author
Article
  • 35 Downloads

Abstract

Transmembrane electric potentials and membrane curvature have always provided pathways to mediate different cellular processes. We present results of molecular dynamics (MD) simulations of lipid monolayer composed of 1, 2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and cholesterol (CHOL) under a transverse electric field to monitor the effect of electric field on membrane containing ganglioside monosialo 1 (GM1). Four systems were studied with membrane monolayer in the presence and absence of GM1 with and without applying electric field along the normal of the monolayer. The applied transmembrane electric field was 0.4 mV/Å which corresponds to the action potential of animal cell. Our results indicate that the electric field induces a considerable lateral stress on the monolayer in the presence of GM1, which is evident from the lateral pressure profiles. It was found that due to the application of electric field major perturbation was caused to the system containing GM1, manifested by the bending of the monolayer. We believe this study provides correlation between electric field and spontaneous membrane bending, specially based on the membrane composition. The consequences of these MD simulations provide considerable insights to different biological phenomenon and lipid membrane models.

Graphic Abstract

Keywords

Gangliosides Action potential External electric field Molecular dynamics Membrane bending 

Notes

Acknowledgements

We acknowledge Dr. Fatemeh Khalili-Aragahi (Department of Physics, University of Illinois, Chicago) since this work had been initiated in her lab. Z.S. thanks the University Grants Commission (UGC), New Delhi, for the Award of a Junior Research Fellowship. This work is partially funded by the Center for Advanced Studies, Department of Chemistry, University of Calcutta. We are also thankful to Centre for Research in Nanoscience and Nanotechnology (CRNN), University of Calcutta.

Funding

The study has received no funding.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical Approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed Consent

This article does not contain any studies with individual participants.

Supplementary material

232_2019_101_MOESM1_ESM.docx (404 kb)
Graphical representation of change in surface area plotted against time. Order parameter calculated for the DMPC sn-1 chain (black line) and sn-2 chain (red line) for the 2:1 DMPC/CHOL system. Supplementary material 1 (DOCX 404 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of ChemistryUniversity of CalcuttaKolkataIndia

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